JP4743631B2 - Semiconductor device and manufacturing method thereof - Google Patents

Semiconductor device and manufacturing method thereof Download PDF

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Publication number
JP4743631B2
JP4743631B2 JP2006287249A JP2006287249A JP4743631B2 JP 4743631 B2 JP4743631 B2 JP 4743631B2 JP 2006287249 A JP2006287249 A JP 2006287249A JP 2006287249 A JP2006287249 A JP 2006287249A JP 4743631 B2 JP4743631 B2 JP 4743631B2
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Japan
Prior art keywords
semiconductor substrate
electrode
layer
wiring layer
semiconductor
Prior art date
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Expired - Fee Related
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JP2006287249A
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Japanese (ja)
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JP2008108764A (en
Inventor
祐一 森田
崇 野間
裕之 篠木
眞三 石部
勝彦 北川
登 大久保
和央 岡田
紘士 山田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanyo Electric Co Ltd
System Solutions Co Ltd
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Sanyo Electric Co Ltd
Sanyo Semiconductor Co Ltd
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Publication date
Application filed by Sanyo Electric Co Ltd, Sanyo Semiconductor Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP2006287249A priority Critical patent/JP4743631B2/en
Priority to TW096136517A priority patent/TWI349982B/en
Priority to US11/875,438 priority patent/US7589388B2/en
Priority to CN200710166886.7A priority patent/CN100546021C/en
Publication of JP2008108764A publication Critical patent/JP2008108764A/en
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Publication of JP4743631B2 publication Critical patent/JP4743631B2/en
Expired - Fee Related legal-status Critical Current
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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
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  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Electromagnetism (AREA)
  • Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)

Abstract

The invention is directed to providing a package type semiconductor device with high reliability and smaller size and a method of manufacturing the same. A semiconductor substrate formed with a device element and a pad electrode on its front surface is prepared. The semiconductor substrate is then selectively etched from its back surface to form an opening. A second insulation film is then formed covering the side and back surfaces of the semiconductor substrate. First and second insulation films on the bottom of the opening are then selectively removed to expose a portion of the pad electrode. A wiring layer is then formed along the side surface of the semiconductor substrate, being electrically connected with the exposed pad electrode. An electrode connect layer is then formed covering the wiring layer. A protection layer is then formed covering the back surface of the semiconductor substrate and having an opening in a region for formation of a sidewall electrode. Then, the sidewall electrode is formed in a region exposed by the opening of the protection layer.

Description

本発明は、半導体装置に関し、特に、パッケージ型の半導体装置及びその製造方法に関するものである。   The present invention relates to a semiconductor device, and more particularly to a package type semiconductor device and a manufacturing method thereof.

近年、新たなパッケージ技術として、ＣＳＰ(Chip Size Package)が注目されている。ＣＳＰとは、半導体チップの外形寸法と略同サイズの外形寸法を有する小型パッケージをいう。   In recent years, CSP (Chip Size Package) has attracted attention as a new packaging technology. The CSP refers to a small package having an outer dimension substantially the same as the outer dimension of a semiconductor chip.

従来より、ＣＳＰの一種として、ＢＧＡ(Ball Grid Array)型の半導体装置が知られている。このＢＧＡ型の半導体装置は、半導体基板上に設けられたパッド電極と電気的に接続されたボール状の導電端子が複数設けられている。   Conventionally, a BGA (Ball Grid Array) type semiconductor device is known as a kind of CSP. This BGA type semiconductor device is provided with a plurality of ball-like conductive terminals electrically connected to pad electrodes provided on a semiconductor substrate.

そして、このＢＧＡ型の半導体装置を電子機器に組み込む際には、各導電端子をプリント基板上の配線パターンに実装することで、半導体チップとプリント基板上に搭載される外部回路とを電気的に接続している。   When this BGA type semiconductor device is incorporated into an electronic device, each conductive terminal is mounted on a wiring pattern on the printed circuit board to electrically connect the semiconductor chip and an external circuit mounted on the printed circuit board. Connected.

このようなＢＧＡ型の半導体装置は、側部に突出したリードピンを有するＳＯＰ(Small Outline Package)やＱＦＰ(Quad Flat Package)等の他のＣＳＰ型の半導体装置に比べて、多数の導電端子を設けることが出来、しかも小型化できるという長所を有するため、幅広く用いられている。   Such BGA type semiconductor devices are provided with a larger number of conductive terminals than other CSP type semiconductor devices such as SOP (Small Outline Package) and QFP (Quad Flat Package) having lead pins protruding from the side. It is widely used because it has the advantage that it can be downsized.

図１４は、従来のＢＧＡ型の半導体装置１１０の概略構成を示す断面図である。シリコン（Ｓｉ）等から成る半導体基板１００の表面には、ＣＣＤ(Charge Coupled Device)型イメージセンサやＣＭＯＳ型イメージセンサ等のデバイス素子１０１が形成され、さらに、パッド電極１０２が第１の絶縁膜１０３を介して形成されている。また、半導体基板１００の表面には、例えばガラス基板１０４がエポキシ樹脂等から成る接着層１０５を介して接着されている。また、半導体基板１００の側面及び裏面には、シリコン酸化膜もしくはシリコン窒化膜等から成る第２の絶縁膜１０６が形成されている。   FIG. 14 is a cross-sectional view showing a schematic configuration of a conventional BGA type semiconductor device 110. On the surface of the semiconductor substrate 100 made of silicon (Si) or the like, a device element 101 such as a CCD (Charge Coupled Device) type image sensor or a CMOS type image sensor is formed. Further, the pad electrode 102 is a first insulating film 103. Is formed through. Further, for example, a glass substrate 104 is bonded to the surface of the semiconductor substrate 100 via an adhesive layer 105 made of epoxy resin or the like. A second insulating film 106 made of a silicon oxide film or a silicon nitride film is formed on the side surface and the back surface of the semiconductor substrate 100.

第２の絶縁膜１０６上には、パッド電極１０２と電気的に接続された配線層１０７が形成されている。配線層１０７は、半導体基板１００の側面及び裏面に形成されている。また、第２の絶縁膜１０６及び配線層１０７を被覆して、ソルダーレジスト等から成る保護層１０８が形成されている。配線層１０７上の保護層１０８の所定領域には開口部が形成され、この開口部を通して配線層１０７と電気的に接続されたボール状の導電端子１０９が形成されている。   A wiring layer 107 electrically connected to the pad electrode 102 is formed on the second insulating film 106. The wiring layer 107 is formed on the side surface and the back surface of the semiconductor substrate 100. Further, a protective layer 108 made of a solder resist or the like is formed so as to cover the second insulating film 106 and the wiring layer 107. An opening is formed in a predetermined region of the protective layer 108 on the wiring layer 107, and a ball-like conductive terminal 109 electrically connected to the wiring layer 107 through the opening is formed.

上述した技術は、例えば以下の特許文献に記載されている。
特開２００５−０７２５５４号公報 The above-described technique is described in, for example, the following patent documents.
JP 2005-072554 A

上述したようなパッケージ型の半導体装置が組み込まれる装置全体として、低背化・小型化が要求されている。   As a whole device in which the package type semiconductor device as described above is incorporated, a reduction in height and size is required.

また、上述した従来の半導体装置１１０では、製造プロセスの過程や実際の使用状態において水，薬液，金属イオンなどの腐食の原因となる物質が浸入し、配線層１０７が腐食するという問題があった。   Further, the above-described conventional semiconductor device 110 has a problem in that a corrosive substance such as water, a chemical solution, or metal ions enters during the manufacturing process or in an actual use state, and the wiring layer 107 is corroded. .

そこで本発明は、信頼性が高く、より小型の装置を実現できるパッケージ型の半導体装置及びその製造方法を提供することを目的とする。   SUMMARY OF THE INVENTION An object of the present invention is to provide a package type semiconductor device that is highly reliable and that can realize a smaller device and a method for manufacturing the same.

本発明は上記課題に鑑みてなされたものであり、その主な特徴は以下のとおりである。すなわち、本発明の半導体装置は、その表面上にデバイス素子が形成された半導体基板と、前記デバイス素子と電気的に接続されたパッド電極と、前記半導体基板の側面及び裏面を被覆する絶縁膜と、前記パッド電極と電気的に接続され、前記半導体基板の側面に沿って前記絶縁膜上に形成された配線層と、金属からなり前記配線層を被覆する電極接続層と、前記電極接続層上に形成され、前記半導体基板の側面側から外部に露出し、前記半導体基板の側面に沿って形成され、かつ前記配線層を介して前記パッド電極と電気的に接続された側壁電極と、前記側壁電極を囲むとともに、前記半導体基板の裏面側を被覆し、前記側壁電極と重畳する領域に開口を有する保護層とを備えることを特徴とする。 The present invention has been made in view of the above problems, and its main features are as follows. That is, the semiconductor device of the present invention includes a semiconductor substrate having a device element formed on the surface thereof, a pad electrode electrically connected to the device element, and an insulating film covering a side surface and a back surface of the semiconductor substrate. A wiring layer electrically connected to the pad electrode and formed on the insulating film along a side surface of the semiconductor substrate, an electrode connection layer made of metal and covering the wiring layer, and the electrode connection layer is formed on the exposed from the side surface side of the semiconductor substrate to the outside, and the formed along the side surface of the semiconductor substrate, and electrically connected to the pad electrode through the wiring layer sidewall electrode, said sidewall A protective layer is provided that surrounds the electrode, covers the back side of the semiconductor substrate, and has an opening in a region overlapping with the side wall electrode.

また、本発明の半導体装置の製造方法は、デバイス素子及び前記デバイス素子と電気的に接続されたパッド電極がその表面上に形成された半導体基板を準備し、前記半導体基板の裏面側から前記半導体基板の一部を除去して、前記パッド電極の少なくとも一部を露出させる工程と、前記露出されたパッド電極と電気的に接続された配線層を、前記半導体基板の側面に絶縁膜を介して形成する工程と、前記配線層を被覆するように、金属からなる電極接続層を形成する工程と、前記半導体基板の裏面側を被覆し、側壁電極形成領域に開口部を有する保護層を形成する工程と、前記保護層が開口した領域の前記電極接続層上に、前記半導体基板の側面側から外部に露出し、前記配線層を介して前記パッド電極と電気的に接続された側壁電極を、前記半導体基板の側面に沿って形成する工程とを備えることを特徴とする。 According to another aspect of the present invention, there is provided a method for manufacturing a semiconductor device, comprising: preparing a semiconductor substrate having a device element and a pad electrode electrically connected to the device element formed on a surface thereof; A step of removing a part of the substrate to expose at least a part of the pad electrode, and a wiring layer electrically connected to the exposed pad electrode via an insulating film on a side surface of the semiconductor substrate A step of forming, a step of forming an electrode connection layer made of metal so as to cover the wiring layer, and a protective layer that covers the back side of the semiconductor substrate and has an opening in the side wall electrode formation region A sidewall electrode exposed to the outside from the side surface side of the semiconductor substrate and electrically connected to the pad electrode through the wiring layer on the electrode connection layer in a region where the protective layer is opened, in front Characterized in that it comprises a step of forming along the side surface of the semiconductor substrate.

本発明では、従来のように半導体基板の裏面上にボール状の導電端子を形成せず、半導体基板の側面に沿って側壁電極が形成されている。そのため、従来に比して半導体装置の低背化を図ることができる。また、本発明では、半導体基板の側面に沿って配線層が形成され、さらに半導体基板の側面に沿って側壁電極が形成されている。そのため、側壁電極が外部からの腐食物質の浸入を防ぎ、配線層の腐食を従来に比して抑えることができる。   In the present invention, the ball-shaped conductive terminal is not formed on the back surface of the semiconductor substrate as in the prior art, and the side wall electrode is formed along the side surface of the semiconductor substrate. Therefore, the height of the semiconductor device can be reduced as compared with the conventional case. In the present invention, the wiring layer is formed along the side surface of the semiconductor substrate, and the sidewall electrode is formed along the side surface of the semiconductor substrate. Therefore, the sidewall electrode can prevent the entry of corrosive substances from the outside, and the corrosion of the wiring layer can be suppressed as compared with the conventional case.

次に、本発明の実施形態について図面を参照しながら説明する。図１乃至図１０はそれぞれ製造工程順に示した断面図あるいは平面図である。   Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 to FIG. 10 are sectional views or plan views respectively shown in the order of the manufacturing process.

まず、図１に示すように、その表面にデバイス素子１（例えば、ＣＣＤや赤外線センサーやＣＭＯＳセンサー等の受光素子や発光素子またはその他の半導体素子）が形成されたシリコン（Ｓｉ）等から成る半導体基板２を準備する。半導体基板２は、例えば３００μｍ〜７００μｍ程度の厚さになっている。そして、半導体基板２の表面に第１の絶縁膜３（例えば、熱酸化法やＣＶＤ法等によって形成されたシリコン酸化膜）を例えば２μｍの膜厚に形成する。   First, as shown in FIG. 1, a semiconductor made of silicon (Si) or the like on which a device element 1 (for example, a light receiving element such as a CCD, an infrared sensor, or a CMOS sensor, a light emitting element, or another semiconductor element) is formed. A substrate 2 is prepared. The semiconductor substrate 2 has a thickness of about 300 μm to 700 μm, for example. Then, a first insulating film 3 (for example, a silicon oxide film formed by a thermal oxidation method, a CVD method, or the like) is formed on the surface of the semiconductor substrate 2 to a thickness of 2 μm, for example.

次に、スパッタリング法やメッキ法、その他の成膜方法によりアルミニウム（Ａｌ）やアルミニウム合金や銅（Ｃｕ）等の金属層を形成し、その後不図示のレジスト層をマスクとして当該金属層を選択的にエッチングし、第１の絶縁膜３上にパッド電極４を例えば１μｍの膜厚に形成する。パッド電極４は、デバイス素子１やその周辺素子と不図示の配線を介して電気的に接続された外部接続用の電極である。なお、図１ではデバイス素子１の両側にパッド電極４が配置されているが、その位置に限定はなく、デバイス素子１上に配置することもできる。   Next, a metal layer such as aluminum (Al), an aluminum alloy, or copper (Cu) is formed by sputtering, plating, or other film formation method, and then the metal layer is selectively used using a resist layer (not shown) as a mask. The pad electrode 4 is formed on the first insulating film 3 to a thickness of 1 μm, for example. The pad electrode 4 is an electrode for external connection that is electrically connected to the device element 1 and its peripheral elements via a wiring (not shown). In FIG. 1, the pad electrode 4 is disposed on both sides of the device element 1, but the position thereof is not limited and can be disposed on the device element 1.

次に、半導体基板２の表面にパッド電極４の一部上あるいは全部を被覆するパッシベーション膜５（例えば、ＣＶＤ法により形成されたシリコン窒化膜）を形成する。図１では、パッド電極４の一部上を被覆するようにしてパッシベーション膜５が形成されている。   Next, a passivation film 5 (for example, a silicon nitride film formed by a CVD method) that covers part or all of the pad electrode 4 is formed on the surface of the semiconductor substrate 2. In FIG. 1, a passivation film 5 is formed so as to cover a part of the pad electrode 4.

次に、パッド電極４を含む半導体基板２の表面上に、エポキシ樹脂，ポリイミド（例えば感光性ポリイミド），レジスト，アクリル等の接着層６を介して支持体７を貼り合せる。   Next, a support 7 is bonded onto the surface of the semiconductor substrate 2 including the pad electrode 4 via an adhesive layer 6 such as epoxy resin, polyimide (for example, photosensitive polyimide), resist, or acrylic.

支持体７は、例えばフィルム状の保護テープでもよいし、ガラスや石英，セラミック，金属等の剛性の基板であってもよいし、樹脂から成るものでもよい。支持体７は、半導体基板２を支持すると共にその素子表面を保護する機能を有するものである。なお、デバイス素子１が受光素子や発光素子である場合には、支持体７は透明もしくは半透明の材料から成り、光を透過させる性状を有するものである。   The support 7 may be, for example, a film-like protective tape, a rigid substrate such as glass, quartz, ceramic, or metal, or may be made of a resin. The support 7 has a function of supporting the semiconductor substrate 2 and protecting the element surface. When the device element 1 is a light receiving element or a light emitting element, the support 7 is made of a transparent or translucent material and has a property of transmitting light.

次に、半導体基板２の裏面に対して裏面研削装置（グラインダー）を用いてバックグラインドを行い、半導体基板２の厚さを所定の厚さ（例えば５０μｍ程度）に薄くする。なお、当該研削工程はエッチング処理でもよいし、グラインダーとエッチング処理の併用でもよい。なお、最終製品の用途や仕様，準備した半導体基板２の当初の厚みによっては、当該研削工程を行う必要がない場合もある。   Next, back grinding is performed on the back surface of the semiconductor substrate 2 using a back grinding device (grinder) to reduce the thickness of the semiconductor substrate 2 to a predetermined thickness (for example, about 50 μm). The grinding process may be an etching process, or a combination of a grinder and an etching process. Depending on the use and specifications of the final product and the initial thickness of the prepared semiconductor substrate 2, the grinding step may not be necessary.

次に、図２に示すように、半導体基板２のうちパッド電極４に対応する所定の領域のみを、半導体基板２の裏面側から選択的にエッチングし、第１の絶縁膜３を一部露出させる。以下、この露出部分を開口部８とする。   Next, as shown in FIG. 2, only a predetermined region corresponding to the pad electrode 4 in the semiconductor substrate 2 is selectively etched from the back side of the semiconductor substrate 2 to partially expose the first insulating film 3. Let Hereinafter, this exposed portion is referred to as an opening 8.

当該半導体基板２の選択的なエッチングについて、図３（ａ），（ｂ）を参照して説明する。図３（ａ），（ｂ）は、下方（半導体基板２側）から見た概略平面図であり、図２は図３（ａ），（ｂ）のＸ−Ｘ線に沿った断面図に対応するものである。   The selective etching of the semiconductor substrate 2 will be described with reference to FIGS. 3A and 3B are schematic plan views as seen from below (semiconductor substrate 2 side), and FIG. 2 is a cross-sectional view taken along line XX in FIGS. 3A and 3B. Corresponding.

図３（ａ）に示すように、半導体基板２を支持体７の幅よりも狭い、略長方形の形状にエッチングすることもできる。また、図３（ｂ）に示すように、パッド電極４が形成された領域のみをエッチングすることで、半導体基板２の外周が凹凸状になるように構成することもできる。後者の方が、半導体基板２と支持体７の重畳する面積が大きく、支持体７の外周近くまで半導体基板２が残る。そのため、半導体基板２に対する支持体７の支持強度が向上する観点からは、後者の構成が好ましい。また、後者の構成によれば、半導体基板２と支持体７の熱膨張率の差異による支持体７の反りが防止できるため、半導体装置のクラックや剥離が防止できる。なお、図３（ａ），（ｂ）で示した平面形状とは別の形状に半導体基板２をデザインすることも可能である。   As shown in FIG. 3A, the semiconductor substrate 2 can be etched into a substantially rectangular shape that is narrower than the width of the support 7. Further, as shown in FIG. 3B, only the region where the pad electrode 4 is formed can be etched so that the outer periphery of the semiconductor substrate 2 becomes uneven. In the latter case, the overlapping area of the semiconductor substrate 2 and the support 7 is larger, and the semiconductor substrate 2 remains near the outer periphery of the support 7. Therefore, the latter configuration is preferable from the viewpoint of improving the support strength of the support 7 with respect to the semiconductor substrate 2. Moreover, according to the latter structure, since the curvature of the support body 7 by the difference in the thermal expansion coefficient of the semiconductor substrate 2 and the support body 7 can be prevented, the crack and peeling of a semiconductor device can be prevented. It is possible to design the semiconductor substrate 2 in a shape different from the planar shape shown in FIGS.

また、本実施形態では半導体基板２の横幅が表面側に行くほど広がるように、半導体基板２の側壁が斜めにエッチングされているが、半導体基板２の幅が一定であり、その側壁が支持体７の主面に対して垂直となるようにエッチングすることもできる。   In the present embodiment, the side wall of the semiconductor substrate 2 is obliquely etched so that the lateral width of the semiconductor substrate 2 increases toward the surface side. However, the width of the semiconductor substrate 2 is constant, and the side wall is a support. It is also possible to perform etching so as to be perpendicular to the main surface 7.

次に、図４に示すように、開口部８内及び半導体基板２の裏面上に第２の絶縁膜９を形成する。この第２の絶縁膜９は、例えばプラズマＣＶＤ法によって形成されたシリコン酸化膜やシリコン窒化膜等の絶縁膜である。   Next, as shown in FIG. 4, a second insulating film 9 is formed in the opening 8 and on the back surface of the semiconductor substrate 2. The second insulating film 9 is an insulating film such as a silicon oxide film or a silicon nitride film formed by a plasma CVD method, for example.

次に、図５に示すように、不図示のレジスト層をマスクとして、第１の絶縁膜３及び第２の絶縁膜９を選択的にエッチングする。このエッチングにより、パッド電極４の一部上からダイシングラインＤＬに至る領域にかけて形成された第１の絶縁膜３及び第２の絶縁膜９が除去され、開口部８の底部においてパッド電極４の少なくとも一部が露出される。   Next, as shown in FIG. 5, the first insulating film 3 and the second insulating film 9 are selectively etched using a resist layer (not shown) as a mask. By this etching, the first insulating film 3 and the second insulating film 9 formed from a part of the pad electrode 4 to the region reaching the dicing line DL are removed, and at least the pad electrode 4 is formed at the bottom of the opening 8. A part is exposed.

次に、スパッタリング法やメッキ法、その他の成膜方法により、配線層１０となるアルミニウム（Ａｌ）や銅（Ｃｕ）等の導電層を例えば１μｍの膜厚で形成する。その後、不図示のレジスト層をマスクとして当該導電層を選択的にエッチングする。このエッチングによって導電層は、図６に示すように、第２の絶縁膜９を介して半導体基板２の側面に沿って形成された配線層１０となる。また、配線層１０はパッド電極４の少なくとも一部と接続され、半導体基板２の裏面の一部上に延在している。   Next, a conductive layer such as aluminum (Al) or copper (Cu) to be the wiring layer 10 is formed with a film thickness of, for example, 1 μm by a sputtering method, a plating method, or other film forming methods. Thereafter, the conductive layer is selectively etched using a resist layer (not shown) as a mask. By this etching, the conductive layer becomes a wiring layer 10 formed along the side surface of the semiconductor substrate 2 via the second insulating film 9 as shown in FIG. The wiring layer 10 is connected to at least a part of the pad electrode 4 and extends on a part of the back surface of the semiconductor substrate 2.

次に、図７に示すように、配線層１０を被覆する電極接続層１１を形成する。電極接続層１１を形成するのは、アルミニウム等から成る配線層１０と、後述するハンダ等から成る側壁電極１３は接合しにくいという理由や、側壁電極１３の材料がパッド電極４に流入してくることを保護するという理由による。従って、図７に示すように配線層１０全体を被覆するように形成することが好ましい。電極接続層１１は、例えばニッケル（Ｎｉ）層と金（Ａｕ）層をこの順にして積層した層であり、レジスト層をマスクとしてこれらの金属を順次スパッタリングし、その後レジスト層を除去するというリフトオフ法や、メッキ法によって形成することができる。   Next, as shown in FIG. 7, an electrode connection layer 11 covering the wiring layer 10 is formed. The electrode connection layer 11 is formed because the wiring layer 10 made of aluminum or the like and the side wall electrode 13 made of solder or the like, which will be described later, are difficult to join, and the material of the side wall electrode 13 flows into the pad electrode 4. It is because of protecting it. Therefore, it is preferable to form the wiring layer 10 so as to cover the entire wiring layer as shown in FIG. The electrode connection layer 11 is a layer in which, for example, a nickel (Ni) layer and a gold (Au) layer are laminated in this order, and lift-off is performed by sequentially sputtering these metals using the resist layer as a mask and then removing the resist layer. It can be formed by a method or a plating method.

なお、電極接続層１１の材質は、配線層１０や側壁電極１３の材質に応じて適宜変更することができる。つまり、ニッケル層と金層以外にチタン（Ｔｉ）層，タングステン（Ｗ）層，銅（Ｃｕ）層，スズ（Ｓｎ）層，バナジウム（Ｖ）層，ニッケルバナジウム（ＮｉＶ）層，モリブテン（Ｍｏ）層，タンタル（Ｔａ）層等で構成されていてもよく、配線層１０と側壁電極１３との電気的な接続を介在し、配線層１０を保護する機能を有するのであればその材質は特に限定されず、それらの単層あるいは積層であってもよい。積層構造の例としては、ニッケル層／金層，チタン層／ニッケル層／銅層，チタン層／ニッケル層／金層，チタン層／ニッケルバナジウム層／銅層等である。   Note that the material of the electrode connection layer 11 can be appropriately changed according to the material of the wiring layer 10 and the sidewall electrode 13. That is, in addition to the nickel layer and gold layer, titanium (Ti) layer, tungsten (W) layer, copper (Cu) layer, tin (Sn) layer, vanadium (V) layer, nickel vanadium (NiV) layer, molybdenum (Mo) The layer may be composed of a layer, a tantalum (Ta) layer, etc., and the material is particularly limited as long as it has a function of protecting the wiring layer 10 through electrical connection between the wiring layer 10 and the sidewall electrode 13. They may be a single layer or a stacked layer. Examples of the laminated structure are nickel layer / gold layer, titanium layer / nickel layer / copper layer, titanium layer / nickel layer / gold layer, titanium layer / nickel vanadium layer / copper layer, and the like.

次に、図８に示すように、後述する側壁電極１３の形成領域に開口を有する保護層１２を、例えば１０μｍの厚みで形成する。保護層１２の形成は例えば以下のように行う。まず、塗布・コーティング法によりポリイミド系樹脂、ソルダーレジスト等の有機系材料を全面に塗布し、熱処理（プリベーク）を施す。次に、塗布された有機系材料を露光・現像して電極接続層１１の表面を露出させる開口を形成し、その後これに熱処理（ポストベーク）を施すことで、側壁電極１３の形成領域に開口を有する保護層１２を得る。   Next, as shown in FIG. 8, a protective layer 12 having an opening in a formation region of a side wall electrode 13 to be described later is formed with a thickness of 10 μm, for example. The protective layer 12 is formed as follows, for example. First, an organic material such as polyimide resin or solder resist is applied to the entire surface by a coating / coating method, and heat treatment (pre-baking) is performed. Next, the applied organic material is exposed and developed to form an opening that exposes the surface of the electrode connection layer 11, and then heat treatment (post-bake) is performed on the opening, so that an opening is formed in the formation region of the sidewall electrode 13. A protective layer 12 having the following is obtained.

次に、保護層１２の開口から露出した電極接続層１１上に導電材料（例えばハンダ）をスクリーン印刷し、この導電材料を熱処理でリフローさせる。こうして、図９に示すように配線層１０及び電極接続層１１を介してパッド電極４と電気的に接続された側壁電極１３が半導体基板２の側面に沿って形成される。本実施形態における側壁電極１３は、パッド電極４の形成位置にほぼ対応しており、支持体７の外周に沿って形成されている。また、半導体基板２の側面側から外部に露出している。   Next, a conductive material (for example, solder) is screen-printed on the electrode connection layer 11 exposed from the opening of the protective layer 12, and the conductive material is reflowed by heat treatment. In this way, side wall electrodes 13 electrically connected to the pad electrodes 4 via the wiring layers 10 and the electrode connection layers 11 are formed along the side surfaces of the semiconductor substrate 2 as shown in FIG. The side wall electrode 13 in this embodiment substantially corresponds to the position where the pad electrode 4 is formed, and is formed along the outer periphery of the support 7. Further, the semiconductor substrate 2 is exposed to the outside from the side surface side.

なお、側壁電極１３の形成方法は上記に限定されることはなく、電極接続層１１をメッキ電極として用いた電解メッキ法や、ディスペンサを用いてハンダ等を所定領域に塗布するいわゆるディスペンス法（塗布法）等で形成することもできる。また、側壁電極１３は、金や銅，ニッケルを材料としたものでもよく、その材料は特に限定されない。   The formation method of the side wall electrode 13 is not limited to the above, and an electroplating method using the electrode connection layer 11 as a plating electrode, or a so-called dispensing method (application method in which solder or the like is applied to a predetermined region using a dispenser. Or the like). The sidewall electrode 13 may be made of gold, copper, or nickel, and the material is not particularly limited.

次に、ダイシングラインＤＬに沿って切断し、個々の半導体装置２０に分割する。なお、個々の半導体装置２０に分割する方法としては、ダイシング法，エッチング法，レーザーカット法等がある。なお、支持体７は半導体基板２に貼り付けたままでもよいが、ダイシング工程の前後で半導体基板２から剥離させてもよい。   Next, the semiconductor device 20 is cut along the dicing line DL and divided into individual semiconductor devices 20. In addition, as a method of dividing into individual semiconductor devices 20, there are a dicing method, an etching method, a laser cut method, and the like. The support 7 may remain attached to the semiconductor substrate 2, but may be peeled off from the semiconductor substrate 2 before and after the dicing process.

図１０は半導体装置２０の裏面側（支持体７が形成されていない側）から見た平面図の概略である。このように、半導体装置２０は、側壁電極１３が外周に沿って複数点在している。なお、図９の半導体装置２０は、図１０のＺ−Ｚ線に沿った断面図に対応する。   FIG. 10 is a schematic plan view seen from the back side of the semiconductor device 20 (side where the support 7 is not formed). Thus, the semiconductor device 20 has a plurality of side wall electrodes 13 scattered along the outer periphery. The semiconductor device 20 in FIG. 9 corresponds to a cross-sectional view taken along the line ZZ in FIG.

本実施形態では、従来構造（図１４参照）のように半導体基板の裏面上にボール状の導電端子を形成せず、半導体基板の側面に沿って側壁電極１３が形成されている。そのため、従来に比して半導体装置の低背化を図ることができる。   In the present embodiment, unlike the conventional structure (see FIG. 14), the ball-shaped conductive terminals are not formed on the back surface of the semiconductor substrate, and the sidewall electrodes 13 are formed along the side surfaces of the semiconductor substrate. Therefore, the height of the semiconductor device can be reduced as compared with the conventional case.

また、半導体基板２の側面に沿って配線層１０が形成され、当該配線層１０は側壁電極１３で被覆されている。そのため、側壁電極１３が配線層１０への腐食物質の浸入を防ぎ、配線層１０の腐食を従来に比して抑えることができる。また、配線層１０を被覆する電極接続層１１によっても、配線層１０への腐食物質の浸入を防止することができる。   A wiring layer 10 is formed along the side surface of the semiconductor substrate 2, and the wiring layer 10 is covered with a side wall electrode 13. Therefore, the sidewall electrode 13 can prevent the entry of a corrosive substance into the wiring layer 10 and can suppress the corrosion of the wiring layer 10 as compared with the conventional case. In addition, the electrode connection layer 11 covering the wiring layer 10 can also prevent the entry of corrosive substances into the wiring layer 10.

ところで、半導体基板２の裏面に配線材料（例えばアルミニウム）が仮に広く形成されている場合には、支持体７側から入射した特定の波長の光（例えば赤外線）が半導体基板２を透過し、配線材料によってデバイス素子１側に反射する場合がある。このことは、デバイス素子１が受光素子である場合、出力画像に配線パターンの模様が映りこむ問題の原因となり得る。   By the way, when a wiring material (for example, aluminum) is widely formed on the back surface of the semiconductor substrate 2, light of a specific wavelength (for example, infrared light) incident from the support 7 side is transmitted through the semiconductor substrate 2 and the wiring. Depending on the material, it may be reflected to the device element 1 side. This can cause a problem that the pattern of the wiring pattern is reflected in the output image when the device element 1 is a light receiving element.

しかし、本実施形態では、当該問題を回避することができる。従来構造では、ボール状の導電端子１０９を形成するために、半導体基板の裏面にある程度の長さの配線層を延在させる必要があった。これに対して本実施形態では、側壁電極１３の形成によって、従来構造に比して半導体基板２の裏面上の配線層１０の長さを短くすることができたからである。   However, this embodiment can avoid the problem. In the conventional structure, in order to form the ball-shaped conductive terminal 109, it is necessary to extend a wiring layer having a certain length on the back surface of the semiconductor substrate. In contrast, in the present embodiment, the length of the wiring layer 10 on the back surface of the semiconductor substrate 2 can be shortened by the formation of the sidewall electrode 13 as compared with the conventional structure.

また、上記配線パターンの映り込みの問題を解消することができるため、半導体基板２の平面的な面積に占めるデバイス素子１の面積を広げることができる。そして、これによって例えば受光領域や発光領域を広げることが可能となり、高性能な半導体装置をより小型に製造できる利点がある。   Moreover, since the problem of the reflection of the wiring pattern can be solved, the area of the device element 1 occupying the planar area of the semiconductor substrate 2 can be increased. As a result, for example, the light receiving region and the light emitting region can be expanded, and there is an advantage that a high performance semiconductor device can be manufactured in a smaller size.

次に、半導体装置２０が回路基板（モジュール基板）に実装された場合の例について説明する。なお、以下の説明では、デバイス素子１がＣＣＤ型やＣＭＯＳ型のイメージセンサ等の受光素子であり、半導体装置２０がカメラモジュールの撮像装置として用いられ場合を例として説明する。   Next, an example in which the semiconductor device 20 is mounted on a circuit board (module board) will be described. In the following description, a case where the device element 1 is a light receiving element such as a CCD type or CMOS type image sensor and the semiconductor device 20 is used as an imaging device of a camera module will be described as an example.

例えば図１１に示すように、プリント基板のような回路基板３０の外部電極３１に側壁電極１３が直接接続される。また、図示はしないが側壁電極１３と他の装置の電極とは、ボンディングワイヤや配線等の導電性物質を介して間接的に接続される場合もある。   For example, as shown in FIG. 11, the side wall electrode 13 is directly connected to the external electrode 31 of the circuit board 30 such as a printed board. Although not shown, the side wall electrode 13 and the electrode of another device may be indirectly connected via a conductive substance such as a bonding wire or wiring.

なお、図１１に示すように、回路基板３０のうち、デバイス素子１の受光領域と重畳した位置であって、側壁電極１３と重畳しない位置に特定の波長の光を吸収する層（例えば赤外線吸収層３２）を形成してもよい。赤外線吸収層３２は、例えば黒色顔料等の赤外線吸収材料が添加された樹脂層から成る。かかる構成によれば、支持体７側から入射して半導体基板２を透過した赤外線が回路基板３０の表面によってデバイス素子１側に反射することを防止することができる。   As shown in FIG. 11, a layer that absorbs light of a specific wavelength at a position that overlaps the light receiving region of the device element 1 and does not overlap the sidewall electrode 13 in the circuit board 30 (for example, infrared absorption) Layer 32) may be formed. The infrared absorption layer 32 is made of a resin layer to which an infrared absorption material such as a black pigment is added. According to such a configuration, it is possible to prevent infrared rays that have entered from the support 7 side and transmitted through the semiconductor substrate 2 from being reflected by the surface of the circuit board 30 to the device element 1 side.

あるいは、図１１における赤外線吸収層３２に替えて、反射層３３を当該位置に形成してもよい。反射層３３は、支持体７から半導体基板２を介してその裏面の方向に入射される特定の波長の光（例えば赤外線）をさらに先まで透過させず、デバイス素子１側に反射させる機能を有する層である。反射層３３は、例えばアルミニウムや銅等の金属材料を含み、ＣＶＤ法やスパッタリング法等の成膜法によって形成される。かかる構成によれば、支持体７側から入射して半導体基板２を透過して反射層３３に達した光がデバイス素子１側に反射される。そのため、デバイス素子１に対する光強度が上昇し、出力画像のコントラストを向上させることができる。   Alternatively, instead of the infrared absorption layer 32 in FIG. 11, the reflective layer 33 may be formed at this position. The reflective layer 33 has a function of reflecting light having a specific wavelength (for example, infrared rays) incident from the support 7 through the semiconductor substrate 2 in the direction of the back surface to the device element 1 side without further transmitting the light. Is a layer. The reflective layer 33 includes a metal material such as aluminum or copper, and is formed by a film forming method such as a CVD method or a sputtering method. According to such a configuration, light that enters from the support 7 side, passes through the semiconductor substrate 2 and reaches the reflection layer 33 is reflected to the device element 1 side. Therefore, the light intensity with respect to the device element 1 is increased, and the contrast of the output image can be improved.

また、半導体装置２０の回路基板への実装は図１２に示すように行うこともできる。図１２に示すように、回路基板３５には凹部３６が形成されており、当該凹部３６に凸部（半導体装置２０の半導体基板２側）を埋め込むようにして半導体装置２０が載置されている。凹部３６の形成は、例えばレーザー照射によるエッチングやドリルによる切削等により行われる。回路基板３５の凹部３３の段差で高くなった表面上には外部電極３７が形成されている。   Also, the semiconductor device 20 can be mounted on the circuit board as shown in FIG. As shown in FIG. 12, a recess 36 is formed in the circuit board 35, and the semiconductor device 20 is placed so as to embed a protrusion (on the semiconductor substrate 2 side of the semiconductor device 20) in the recess 36. . The recess 36 is formed by, for example, etching by laser irradiation or cutting with a drill. An external electrode 37 is formed on the surface of the circuit board 35 that is raised by the step of the recess 33.

そして、側壁電極１３のうち支持体７に近い部分と外部電極３７とが直接接続されている。なお、凹部３６の側面に沿って外部電極３８を設け、当該外部電極３８と側壁電極１３とを直接接続してもよい。このように、本実施形態に係る半導体装置によれば、回路基板への実装の仕方にバリエーションを持たせることができ、設計の自由度が向上する。   And the part near the support body 7 among the side wall electrodes 13 and the external electrode 37 are directly connected. Note that an external electrode 38 may be provided along the side surface of the recess 36 and the external electrode 38 and the sidewall electrode 13 may be directly connected. Thus, according to the semiconductor device according to the present embodiment, variations can be made in the way of mounting on the circuit board, and the degree of freedom in design is improved.

また、従来構造（図１４参照）では、回路基板に半導体装置１１０を実装させた後に、導電端子１０９の形成部分に導電材料を補充することは困難である。つまり、導電端子１０９を構成する導電材料が不足した状態で半導体装置が完成し、その後回路基板に実装されてしまった場合には接続不良の問題が生じ、これを解消することは難しい。これに対して本実施形態では、側壁電極１３が半導体基板２の側面に沿って形成されている。そのため、回路基板への実装後に、例えば図１２の半導体装置２０と回路基板３５の間から矢印４０に示すように側壁電極１３の材料（例えばハンダ）を補充し、接続不良の問題を事後的に解消することができる。   In the conventional structure (see FIG. 14), it is difficult to replenish a conductive material in a portion where the conductive terminal 109 is formed after the semiconductor device 110 is mounted on the circuit board. That is, when the semiconductor device is completed in a state where the conductive material constituting the conductive terminal 109 is insufficient and then mounted on the circuit board, a problem of poor connection occurs, and it is difficult to solve this. On the other hand, in the present embodiment, the sidewall electrode 13 is formed along the side surface of the semiconductor substrate 2. Therefore, after mounting on the circuit board, the material of the side wall electrode 13 (for example, solder) is replenished as shown by an arrow 40 from between the semiconductor device 20 and the circuit board 35 in FIG. Can be resolved.

なお、本発明は上記実施形態に限定されることはなくその要旨を逸脱しない範囲で設計変更が可能であることは言うまでも無い。例えば図１３に示すように、配線層１０を形成する工程の際に、配線層１０が半導体基板２の裏面の一部上に延在しないように形成することもできる。また、同図に示すように、電極接続層１１についても半導体基板２の裏面の一部上に延在しないように形成することもできる。このように配線層１０や電極接続層１１をパターニングすることで、側壁電極１３が半導体基板２の裏面側から突出することを抑え、半導体装置の更なる低背化を図ることも可能である。なお、この場合の側壁電極１３は、ディスペンス法で形成することが好ましい。   Needless to say, the present invention is not limited to the above-described embodiment, and the design can be changed without departing from the gist thereof. For example, as shown in FIG. 13, the wiring layer 10 may be formed so as not to extend on a part of the back surface of the semiconductor substrate 2 in the step of forming the wiring layer 10. Moreover, as shown in the figure, the electrode connection layer 11 can also be formed so as not to extend on a part of the back surface of the semiconductor substrate 2. By patterning the wiring layer 10 and the electrode connection layer 11 in this way, it is possible to prevent the side wall electrode 13 from protruding from the back side of the semiconductor substrate 2 and to further reduce the height of the semiconductor device. In this case, the side wall electrode 13 is preferably formed by a dispensing method.

また、側壁電極１３が半導体基板２の裏面側から突出することを抑える別の実施形態として、図７に示すように半導体基板２の裏面の一部上に延在する配線層１０及び電極接続層１１を形成した後に、図１３で示したように電極接続層１１を被覆するとともに半導体基板２の裏面側を被覆する保護層１２を形成し、その後保護層１２で被覆されていない電極接続層１１上に側壁電極１３を形成することもできる。   Further, as another embodiment for suppressing the side wall electrode 13 from protruding from the back surface side of the semiconductor substrate 2, as shown in FIG. 7, a wiring layer 10 and an electrode connection layer extending on a part of the back surface of the semiconductor substrate 2. After forming 11, as shown in FIG. 13, the electrode connection layer 11 is covered and the protective layer 12 covering the back side of the semiconductor substrate 2 is formed, and then the electrode connection layer 11 not covered with the protective layer 12 is formed. The sidewall electrode 13 can also be formed thereon.

本発明の実施形態に係る半導体装置及びその製造方法を説明する断面図である。It is sectional drawing explaining the semiconductor device which concerns on embodiment of this invention, and its manufacturing method. 本発明の実施形態に係る半導体装置及びその製造方法を説明する断面図である。It is sectional drawing explaining the semiconductor device which concerns on embodiment of this invention, and its manufacturing method. 本発明の実施形態に係る半導体装置及びその製造方法を説明する平面図である。It is a top view explaining the semiconductor device concerning the embodiment of the present invention, and its manufacturing method. 本発明の実施形態に係る半導体装置及びその製造方法を説明する断面図である。It is sectional drawing explaining the semiconductor device which concerns on embodiment of this invention, and its manufacturing method. 本発明の実施形態に係る半導体装置及びその製造方法を説明する断面図である。It is sectional drawing explaining the semiconductor device which concerns on embodiment of this invention, and its manufacturing method. 本発明の実施形態に係る半導体装置及びその製造方法を説明する断面図である。It is sectional drawing explaining the semiconductor device which concerns on embodiment of this invention, and its manufacturing method. 本発明の実施形態に係る半導体装置及びその製造方法を説明する断面図である。It is sectional drawing explaining the semiconductor device which concerns on embodiment of this invention, and its manufacturing method. 本発明の実施形態に係る半導体装置及びその製造方法を説明する断面図である。It is sectional drawing explaining the semiconductor device which concerns on embodiment of this invention, and its manufacturing method. 本発明の実施形態に係る半導体装置及びその製造方法を説明する平面図である。It is a top view explaining the semiconductor device concerning the embodiment of the present invention, and its manufacturing method. 本発明の実施形態に係る半導体装置及びその製造方法を説明する断面図である。It is sectional drawing explaining the semiconductor device which concerns on embodiment of this invention, and its manufacturing method. 本発明の実施形態に係る半導体装置及びその製造方法を説明する断面図である。It is sectional drawing explaining the semiconductor device which concerns on embodiment of this invention, and its manufacturing method. 本発明の実施形態に係る半導体装置及びその製造方法を説明する断面図である。It is sectional drawing explaining the semiconductor device which concerns on embodiment of this invention, and its manufacturing method. 本発明の他の実施形態に係る半導体装置及びその製造方法を説明する断面図である。It is sectional drawing explaining the semiconductor device which concerns on other embodiment of this invention, and its manufacturing method. 従来の半導体装置を説明する断面図である。It is sectional drawing explaining the conventional semiconductor device.

符号の説明Explanation of symbols

１ デバイス素子 ２ 半導体基板 ３ 第１の絶縁膜 ４ パッド電極
５ パッシベーション膜 ６ 接着層 ７ 支持体 ８ 開口部
９ 第２の絶縁膜 １０ 配線層 １１ 電極接続層 １２ 保護層
１３ 側壁電極 ２０ 半導体装置 ３０ 回路基板 ３１ 外部電極
３２ 赤外線吸収層 ３３ 反射層 ３５ 回路基板 ３６ 凹部
３７ 外部電極 ３８ 外部電極 １００ 半導体基板
１０１ デバイス素子 １０２ パッド電極 １０３ 第１の絶縁膜
１０４ ガラス基板 １０５ 接着層 １０６ 第２の絶縁膜
１０７ 配線層 １０８ 保護層 １０９ 導電端子 １１０ 半導体装置
ＤＬ ダイシングライン DESCRIPTION OF SYMBOLS 1 Device element 2 Semiconductor substrate 3 1st insulating film 4 Pad electrode 5 Passivation film 6 Adhesive layer 7 Support body 8 Opening part
DESCRIPTION OF SYMBOLS 9 2nd insulating film 10 Wiring layer 11 Electrode connection layer 12 Protective layer 13 Side wall electrode 20 Semiconductor device 30 Circuit board 31 External electrode 32 Infrared absorption layer 33 Reflective layer 35 Circuit board 36 Recess 37 External electrode 38 External electrode 100 Semiconductor substrate 101 Device element 102 Pad electrode 103 First insulating film 104 Glass substrate 105 Adhesive layer 106 Second insulating film 107 Wiring layer 108 Protective layer 109 Conductive terminal 110 Semiconductor device DL Dicing line

Claims (8)

その表面上にデバイス素子が形成された半導体基板と、
前記デバイス素子と電気的に接続されたパッド電極と、
前記半導体基板の側面及び裏面を被覆する絶縁膜と、
前記パッド電極と電気的に接続され、前記半導体基板の側面に沿って前記絶縁膜上に形成された配線層と、
金属からなり前記配線層を被覆する電極接続層と、
前記電極接続層上に形成され、前記半導体基板の側面側から外部に露出し、前記半導体基板の側面に沿って形成され、かつ前記配線層を介して前記パッド電極と電気的に接続された側壁電極と、
前記側壁電極を囲むとともに、前記半導体基板の裏面側を被覆し、前記側壁電極と重畳する領域に開口を有する保護層とを備えることを特徴とする半導体装置。 A semiconductor substrate having device elements formed on the surface;
A pad electrode electrically connected to the device element;
An insulating film covering the side and back surfaces of the semiconductor substrate;
A wiring layer electrically connected to the pad electrode and formed on the insulating film along a side surface of the semiconductor substrate;
An electrode connection layer made of metal and covering the wiring layer;
A side wall formed on the electrode connection layer, exposed to the outside from the side surface of the semiconductor substrate, formed along the side surface of the semiconductor substrate, and electrically connected to the pad electrode through the wiring layer Electrodes,
A semiconductor device comprising: a protective layer that surrounds the sidewall electrode, covers a back surface side of the semiconductor substrate, and has an opening in a region overlapping with the sidewall electrode. 前記半導体基板の表面上に接着層を介して貼り合わされた支持体を備えることを特徴とする請求項１に記載の半導体装置。   The semiconductor device according to claim 1, further comprising a support bonded to the surface of the semiconductor substrate via an adhesive layer. 前記配線層は、前記半導体基板の裏面の一部上に延在していることを特徴とする請求項１または請求項２に記載の半導体装置。   The semiconductor device according to claim 1, wherein the wiring layer extends on a part of a back surface of the semiconductor substrate. デバイス素子及び前記デバイス素子と電気的に接続されたパッド電極がその表面上に形成された半導体基板を準備し、
前記半導体基板の裏面側から前記半導体基板の一部を除去して、前記パッド電極の少なくとも一部を露出させる工程と、
前記露出されたパッド電極と電気的に接続された配線層を、前記半導体基板の側面に絶縁膜を介して形成する工程と、
前記配線層を被覆するように、金属からなる電極接続層を形成する工程と、
前記半導体基板の裏面側を被覆し、側壁電極形成領域に開口部を有する保護層を形成する工程と、
前記保護層が開口した領域の前記電極接続層上に、前記半導体基板の側面側から外部に露出し、前記配線層を介して前記パッド電極と電気的に接続された側壁電極を、前記半導体基板の側面に沿って形成する工程とを備えることを特徴とする半導体装置の製造方法。 Preparing a semiconductor substrate on which a device element and a pad electrode electrically connected to the device element are formed;
Removing a portion of the semiconductor substrate from the back side of the semiconductor substrate to expose at least a portion of the pad electrode;
Forming a wiring layer electrically connected to the exposed pad electrode on the side surface of the semiconductor substrate via an insulating film;
Forming an electrode connection layer made of metal so as to cover the wiring layer;
Covering the back side of the semiconductor substrate and forming a protective layer having an opening in a sidewall electrode formation region;
Side wall electrodes exposed to the outside from the side surface side of the semiconductor substrate and electrically connected to the pad electrode through the wiring layer are formed on the electrode connection layer in the region where the protective layer is opened. And a step of forming along the side surface of the semiconductor device. 前記半導体基板の表面上に接着層を介して支持体を貼り合わせる工程を備えることを特徴とする請求項４に記載の半導体装置の製造方法。   The method for manufacturing a semiconductor device according to claim 4, further comprising a step of attaching a support to the surface of the semiconductor substrate via an adhesive layer. 前記絶縁膜は前記半導体基板の裏面上にも形成され、
前記配線層を形成する工程では、前記配線層が前記半導体基板の裏面の前記絶縁膜の一部上に延在するように形成することを特徴とする請求項４または請求項５に記載の半導体装置の製造方法。 The insulating film is also formed on the back surface of the semiconductor substrate,
6. The semiconductor according to claim 4, wherein in the step of forming the wiring layer, the wiring layer is formed so as to extend on a part of the insulating film on a back surface of the semiconductor substrate. Device manufacturing method. 凹部を有し前記凹部の周囲の表面又は前記凹部内の側面に外部電極を有した回路基板を備え、
前記凹部内に前記半導体基板が載置され、前記外部電極と、露出した前記側壁電極が直接接続されていることを特徴とする請求項１乃至請求項３のいずれかに記載の半導体装置。 A circuit board having a recess and having an external electrode on a surface around the recess or a side surface in the recess,
4. The semiconductor device according to claim 1, wherein the semiconductor substrate is placed in the recess, and the external electrode is directly connected to the exposed side wall electrode. 5. 前記側壁電極を形成する工程の後、
回路基板に形成された凹部内に、前記半導体基板を載置し、前記回路基板の前記凹部の周囲の表面又は前記凹部内の側面に設けられた外部電極と、露出した前記側壁電極を直接接続する工程を含むことを特徴とする請求項４乃至請求項６のいずれかに記載の半導体装置の製造方法。 After the step of forming the sidewall electrode,
The semiconductor substrate is placed in a recess formed in the circuit board, and the exposed external electrode and the exposed sidewall electrode are directly connected to the surface of the circuit board around the recess or the side surface in the recess. The method for manufacturing a semiconductor device according to claim 4, further comprising a step of:
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